Financial Instruments and Fair Value Measurement - Fair value of derivatives (Details) - Derivatives designated as hedging instruments: - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative assets	$ 10	$ 2
Derivative liabilities	2	9
Interest Rate Swap Agreements
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivative liabilities	2	6
Foreign currency contracts
Derivatives, Fair Value [Line Items]
Derivative assets	1	0
Derivative liabilities	0	3
Commodity contracts
Derivatives, Fair Value [Line Items]
Derivative assets	9	2
Derivative liabilities	0	0
Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets	9	2
Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	2	$ 9
Other Noncurrent Assets
Derivatives, Fair Value [Line Items]
Derivative assets	$ 1

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant